6. For each skeleton equation below, classify the type of reaction as a synthesis decomposition, single replacement, double replacement, neutralization, or combustion reaction. Justify your classification. Then write the balanced chemical equation for each.

a) C4H10(g) + O2(g) → CO2(g) + H₂O(g)

b) Li(s) + N₂(g) → Li3N(s)

c) AgNO3(aq) + Na₂CrO4(aq)
NaNO3(aq) + Ag₂CrO4(s)

d) MgO(s)→ Mg(s) + O₂(g)

e) HI(aq) + KOH(aq) →KI(aq) +H₂O(l)

f) AlPO4(aq) + Mg(s) → Al(s) + Mg3(PO4)2(aq)